Thanks to you both.

Does this behaviour pose any problem if I want to anonymize bitcoins? I haven't started researching that field of knowledge yet, but it sounds like it could be a risk, say I send 0.5 BTC to a randomizer and another 1.0 happens to end up on the same address I receive the anonymized BTC on?



I hate when programs assumes the users doesn't want to know what's going on "under the hood". Sure, most people don't care and maybe find it confusing, but they could at least put in something like a "show advanced settings and information" checkbox...